Ford v



J. M. WOLL;

TUNNEL VENTILATING SYSTEM Sep?. VZ7 1,927.

ginal Filed July 25, 1925 seq Q C xNvENToR A MJA/0a.

ATTORNEYS Patented Sept. 27, 1927.

UNITED STATES PATENT OFFICE.,

JOHN MATTHEW WOLL, OF KITTANNING, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO JOHN JACOB LIPPUNER, OF OREGON CITY, OREGON; FORD V. WOLL ADMINIS- TRATOR 0F JOHN M. WOLL, DECEASED.

TUNNEL-VENTILATING SYSTEM.

Application led J'uly 23, 1925, Serial No. 45,671. Renewed August 10, 1927.

My invention relates to tunnels and particularly to means for Ventilating the same. The invention has for its general object to provide a novel Ventilating means whereby a forced circulation of air is provided and the foul air in the tunnel exhausted and discharged to the atmosphere. The nature of my invention, its distinguishing features, and advantages Will clearly appear as the description proceeds.

Reference is to be had to be accompanying drawings forming a part of this speciiication, it being understood that the drawings are merely illustrative of one example of the invention.

Figure l is a longitudinal vertical section of a tunnel equipped with my improved ventilating means.

Figure 2 is a cross section on line 2--2 of Figure l.

ln carrying out my invention in practice and according with the illust-rated example two air ducts 10 are provided in the form of pipes disposed below the level of the track bed a of the tunnel A. On the roof of the tunnel A. are disposed a plurality of air ducts 11 side by side formed of any suitable arched material, the bottom of the ducts 11 being formed by the top surface of the tunnel A. The pipes 10 have vertical air outlets 12 and in the air ducts l1 are the fans 13. Each pipe l() also has at the ends thereof vertical inlets 14 communicating with the interior of the casin of a fan 15 which sends fresh air into t ie pipes 10. Leading into the air ducts 11 are air inlets 16. The :t'ans 13 are motor driven, the motor being conventionally indicated at 17 in Figure 1. Said fans 13 are arranged at each end of the ducts 11 and serve to draw the air from said ducts to the ends of the tunnel where the sai-d fans are located.

In practice the fans 13 being driven, air will be exhausted from the ducts 11, the air thus passing through the inlets 16 in the roof. At the same time air passes into the tunnel at the bottom from the pipes 10 and the outlets 12 leading from said pipes to the interior ci the tunnel A. The arrangement serves to keep the tunnel effectively ventilated.

I would state in conclusion that While the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the exact details herein illustrated, since, manifestly, the same can be considerably varied without departure from the spirit of the invention as defined in the appended claim.

Having thus described my invention, I claim A tunnel Ventilating system including air ducts disposed below the bottom of the tunneland having air inlets affording admission of air at the ends, air inlets leading to the tunnel at the bottom from said air ducts, external air ducts disposed longitudinally on the roof of the tunnel, the top of the tunnel forming the bottom of said second mentioned air ducts, air inlets leading to said second mentioned air ducts from the interior of the tunnel, and driven fans in said second mentioned air duct serving to draw air therefrom and from the tunnel the air admitted from the iirst mentioned air ducts and first mentioned air inlets.

JOHN MATTI-IEW WOLL.

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